AI Article Synopsis
- The study explored how changes in plantar flexor strength affect coordination modes during movement tasks.
- Participants displayed only in-phase and anti-phase coordination, switching modes as target frequency increased.
- Fatigue from muscle stimulation decreased performance and reduced the frequency of coordination mode switching, linking strength at the ankle joint to coordination effectiveness.
Article Abstract
The aim of the present study was to investigate the influence of a modification of an intrinsic capacity (plantar flexor strength) on the implementation of in-phase and anti-phase mode of coordination. Analysis of hip and ankle relative phases during fore-aft tracking task was done before and after an electromyostimulation fatigue protocol on the soleus muscles. Results showed participants used exclusively in-phase and anti-phase modes of coordination, with a sudden switch from one to the other with target frequency increase. Regarding tracking tasks, fatigue induces a decrease of performance for lower frequencies, and a significant decrease of switch frequency (-0.08 Hz) for each subject. In conclusion, changes in mode of coordination implementation suggest that the in-phase mode implementation is highly linked to the strength production capacity at the ankle joint.
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| http://dx.doi.org/10.1016/j.neulet.2006.10.025 | DOI Listing |
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